Finding the Fourth Proportional to 24,799.50, 34,223.31 and 13,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   24,799.50 : 34,223.31 = 13,621.50 : x
2. Step 2: Convert to fraction form
   24,799.50/34,223.31 = 13,621.50/x
3. Step 3: Cross multiply
   24,799.50x = 34,223.31 × 13,621.50
4. Step 4: Simplify right side
   24,799.50x = 466,172,817.17
5. Step 5: Solve for x
   x = 466,172,817.17/24,799.50
6. Step 6: Final answer
   x = 18,797.67